Page 7 · Reference
Licensing Explorer
A single source of truth for which SKUs are required for each part of the solution — for users, agents, resource accounts and the tenant.
Microsoft
Microsoft Teams
UserAgentResource AccountTenant
Purpose
Base collaboration client (chat, meetings, channels).
When required
Always — required for any calling scenario.
Who needs it
Every user in the organisation.
Typical scenarios
CollaborationMeetingsFoundation for Teams Phone
Microsoft
Teams Phone Standard
UserAgentResource AccountTenant
Purpose
Adds PBX calling capabilities to a Teams user.
When required
Whenever a user needs a DID, receives PSTN calls or answers queue calls.
Who needs it
All users making/receiving external calls, and all call queue agents.
Typical scenarios
Direct DID userCall Queue agentDelegation
Microsoft
Teams Premium
UserAgentResource AccountTenant
Purpose
Advanced meetings, webinars, AI features, extra calling policies.
When required
Optional — when advanced meetings or premium calling features are required.
Who needs it
Executives, meetings-heavy roles, contact-centre supervisors.
Typical scenarios
Intelligent recapAdvanced webinarsEnhanced calling reports
Microsoft
Teams Phone Resource Account
UserAgentResource AccountTenant
Purpose
Free SKU that lets a resource account hold a service number for an Auto Attendant or Call Queue.
When required
For every Auto Attendant or Call Queue that owns a public number.
Who needs it
Assigned to the resource account, never to a real user.
Typical scenarios
Auto AttendantCall QueueMulti-number service routing
Ctelo
Ctelo Voice
UserAgentResource AccountTenant
Purpose
Managed global PSTN connectivity delivered to Microsoft Teams.
When required
Whenever the tenant needs inbound / outbound PSTN calling.
Who needs it
The tenant / organisation as a whole.
Typical scenarios
Global calling plan replacementDirect Routing at scaleMulti-country PSTN
Microsoft
Auto Attendant
UserAgentResource AccountTenant
Purpose
The IVR service itself — included with Teams Phone.
When required
Anywhere you need automated call routing.
Who needs it
Configured by Teams admins on top of resource accounts.
Typical scenarios
Main IVRAfter-hours routingLanguage menus
Microsoft
Call Queue
UserAgentResource AccountTenant
Purpose
The queueing / distribution service — included with Teams Phone.
When required
Anywhere calls are distributed across a team.
Who needs it
Configured by Teams admins on top of resource accounts.
Typical scenarios
Sales queueSupport tier 1Reception ring group